支持全文索引

代码样例片段

以下代码片段在hbase.examples包的“LunaSample”类的testFullTextScan方法中。

 public static void testFullTextScan() throws Exception {
    /**
     * Create create request of Solr. Specify collection name, confset name,
     * number of shards, and number of replication factor.
     */
    Create create = new Create();
    create.setCollectionName(COLLECTION_NAME);
    create.setConfigName(CONFSET_NAME);
    create.setNumShards(NUM_OF_SHARDS);
    create.setReplicationFactor(NUM_OF_REPLICATIONFACTOR);
    /**
     * Create mapping. Specify index fields(mandatory) and non-index
     * fields(optional).
     */
    List<ColumnField> indexedFields = new ArrayList<ColumnField>();
    indexedFields.add(new ColumnField("name", "f:n"));
    indexedFields.add(new ColumnField("cat", "f:t"));
    indexedFields.add(new ColumnField("features", "f:d"));
    Mapping mapping = new Mapping(indexedFields);
    /**
     * Create table descriptor of HBase.
     */
    HTableDescriptor desc = new HTableDescriptor(HBASE_TABLE);
    desc.addFamily(new HColumnDescriptor(TABLE_FAMILY));
    /**
     * Create table and collection at the same time.
     */
    LunaAdmin admin = null;
    try {
      admin = new AdminSingleton().getAdmin();
      admin.deleteTable(HBASE_TABLE);
      if (!admin.tableExists(HBASE_TABLE)) {
        admin.createTable(desc, Bytes.toByteArrays(new String[] { "0", "1", "2", "3", "4" }),
            create, mapping);
      }
      /**
       * Put data.
       */
      Table table = admin.getTable(HBASE_TABLE);
      int i = 0;
      while (i < 5) {
        byte[] row = Bytes.toBytes(i + "+sohrowkey");
        Put put = new Put(row);
        put.addColumn(TABLE_FAMILY, Bytes.toBytes("n"), Bytes.toBytes("ZhangSan" + i));
        put.addColumn(TABLE_FAMILY, Bytes.toBytes("t"), Bytes.toBytes("CO" + i));
        put.addColumn(TABLE_FAMILY, Bytes.toBytes("d"), Bytes.toBytes("Male, Leader of M.O" + i));
        table.put(put);
        i++;
      }

      /**
       * Scan table.
       */
      Scan scan = new Scan();
      SolrQuery query = new SolrQuery();
      query.setQuery("name:ZhangSan1 AND cat:CO1");
      Filter filter = new FullTextFilter(query, COLLECTION_NAME);
      scan.setFilter(filter);
      ResultScanner scanner = table.getScanner(scan);
      LOG.info("-----------------records----------------");
      for (Result r = scanner.next(); r != null; r = scanner.next()) {
        for (Cell cell : r.rawCells()) {
          LOG.info(Bytes.toString(CellUtil.cloneRow(cell)) + ":"
              + Bytes.toString(CellUtil.cloneFamily(cell)) + ","
              + Bytes.toString(CellUtil.cloneQualifier(cell)) + ","
              + Bytes.toString(CellUtil.cloneValue(cell)));
        }
      }
      LOG.info("-------------------end------------------");
      /**
       * Delete collection.
       */
      admin.deleteCollection(HBASE_TABLE, COLLECTION_NAME);

      /**
       * Delete table.
       */
      admin.deleteTable(HBASE_TABLE);
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      /**
       * When everything done, close LunaAdmin.
       */
      admin.close();
    }
  }

注意事项

• 创建表和索引都必须不存在。
• 必须使用LunaAdmin获取Table对象进行scan操作。